#51CA7A
Closest named color: Seaweed (#18D17B). oklch(75.1% 0.158 151.7), rgb(81, 202, 122).
Aa
Black text reads best on this color (10.07:1).
About this color
#51CA7A is a medium-light, vivid green. In OKLCH its lightness is 75%, its chroma 0.158 and its hue 152°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.027 away. Black text reads best on it, at 10.07:1.
| Hue family | Greens |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.158) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.07:1 |
| White text | 2.08:1 |
Values
| HEX | #51CA7A |
| RGB | rgb(81, 202, 122) |
| HSL | hsl(140, 53%, 55%) |
| OKLCH | oklch(75.1% 0.158 151.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #51CA7A | 2.08:1 | Fails | Lc -45.0 | Non-text elements, placeholder text |
| Black text on #51CA7A | 10.07:1 | AAA | Lc 63.5 | Content text, not long reading |
| #51CA7A text on white | 2.08:1 | Fails | Lc 40.4 | Non-text elements, placeholder text |
| #51CA7A text on black | 10.07:1 | AAA | Lc -61.9 | Content text, not long reading |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 400.
-
Step 50
50
#EFF8F1
oklch(97% 0.013 152.6)
-
Step 100
100
#DDF0E1
oklch(93.7% 0.028 151.9)
-
Step 200
200
#BFE4C7
oklch(88.4% 0.055 151.6)
-
Step 300
300
#90D3A1
oklch(80.9% 0.098 151.7)
-
Step 400
400 (this color)
#51CA7A
oklch(75.1% 0.158 151.7)
-
Step 500
500
#00A552
oklch(63.2% 0.168 151.6)
-
Step 600
600
#008A44
oklch(55.5% 0.147 151.7)
-
Step 700
700
#007539
oklch(49.2% 0.13 151.8)
-
Step 800
800
#00602D
oklch(42.8% 0.114 151.6)
-
Step 900
900
#005025
oklch(37.8% 0.1 151.8)
-
Step 950
950
#003013
oklch(27.1% 0.072 151.4)
#51CA7A with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #CBBA74 | 0.136 |
| Deuteranopia (no green cones) | #BBAF7F | 0.133 |
| Tritanopia (no blue cones) | #2AC7B6 | 0.084 |
| Achromatopsia (no color) | #B4B4B4 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51CA7A
#51CA7A
oklch(75.1% 0.158 151.7)
- #E786DB
#E786DB
oklch(75.1% 0.158 331.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #51CA7A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.027
- Soft Green #6FC276 ΔE 0.029
- Dark Mint #48C072 ΔE 0.030
- Algae Green #21C36F ΔE 0.035
- Greenblue #23C48B ΔE 0.038
- Dark Mint Green #20C073 ΔE 0.041
- Emerald #06D6A0 ΔE 0.049
- Green Blue #01C08D ΔE 0.052
Use #51CA7A in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.